Li Xiang pointed with his hand and made a mark. Pen "Fun" Pavilion www.biquge.info

"If the sun is in this position, the sun is direct, and that's summer. Turn to the other side, the sun is oblique, and it is winter. ”

Everyone was silent, thinking in their hearts what Li Xiang had just said, and a few slightly smarter people had already figured it out, which just explained why the sun rose in the east and set in the west, all year round, day and night, so they couldn't help but ask: "Then how does Li Gongzi explain the lack of the moon?" The tone has changed dramatically. Despite this, nine out of ten people disagreed with Li Xiang's remarks.

Li Xiang smiled, drew the moon next to the earth again, and said: "The moon is actually a sphere revolving around the earth, but it is much smaller than the earth. Every time the moon makes one revolution around the earth, it is exactly about thirty days. And the light of the sun on the moon, if it appears obliquely from the earth, is the moon, and if it is direct, it is the fifteenth full moon. The different positions of the moon, the earth, and the sun form the first quarter moon, the full moon, the last quarter moon, and some areas can also see the lunar eclipse. ”

Li Xiang gestured with his fist and head again and again, and everyone finally understood what he was trying to say.

Rizune nodded his head, not knowing what he was thinking. Then he asked, "As Li Aiqing said, this sun is the center of the universe?" ”

Li Xiang shook his head and said, "Although the earth revolves around the sun, it is not the center of the universe. He bowed his head and pondered for a long time, and when everyone saw that he was thoughtful, they waited quietly.

Li Xiang continued: "Do you know why you saw lightning first and then heard thunder? The reason is that light travels much faster than sound, and in fact thunder and lightning are born at the same time, but from miles away, it looks like lightning is seen first, and then thunder is heard. The so-called flick of the finger refers to a brief moment, let's call it a second. ”

Li Xiang said, counting "one, two, thirty" with a pause, and then he calculated the conversion of ancient miles and modern kilometers, and then said: "Just now, I counted ten times, which is ten seconds. Sound can travel one mile in one second, but light can travel eight hundred thousand miles in one second. ”

Everyone exclaimed, 800,000 miles, what kind of concept is this? Several people have begun to calculate how many distances between Lin'an and Bianliang can make up 800,000 miles. However, more people still have the mentality of watching the excitement, thinking that although the performance of this jumping clown is a little too much, it is not impossible to watch it as a joke.

"The distance between the moon and the earth is about one million miles, and the distance between the earth and the sun is about five hundred seconds. Although the sun is far away from the earth, because the heat it emits is very huge, and the volume is tens of thousands of times that of the earth, the earth can still feel the warmth of the sun. Most of the stars in the sky are light spheres like the sun, some of which are many times larger than the sun. When the night sky is clear, the Milky Way we see is called the Milky Way. The sun is one of the billions of light spheres in the Milky Way, and this Milky Way is actually disk-shaped, but we are in the Milky Way, so it looks like the Milky Way is a ribbon. And light goes from one end of the galaxy to the other, guess how many years? ”

Li Xiang couldn't remember how many stars there were in the Milky Way, and casually said a number, thinking that it was not much worse, everyone was already stunned, at this time Li Xiang asked, and was busy calculating, and after a while, he only heard someone in the audience ask: "But how many hundred years?" ”

Li Xiang laughed and said, "It's only a few hundred years, and it's too much to underestimate the huge galaxy, but it's actually a billion years. ”

I only heard the exclamation much louder than before, although everyone didn't believe it before, but what Li Xiang said before just explained the natural phenomenon of the sun, moon and stars, and a few people also believed it at this time.

Zong pondered for a long time, and then said with a smile: "If it is really as Li Aiqing said, this all-encompassing universe is unimaginable, the vast universe, let alone people, hehe, it is the Great Song Dynasty, plus Mongolia, and even the entire earth, is also like a drop in the ocean." ”

Li Xiang was stunned, he didn't expect Li Zong to be so knowledgeable, he said cautiously: "Your Majesty, in fact, the Milky Way is only a small part of the universe, compared to the entire universe, the Milky Way is only a drop in the ocean. ”

When the crowd heard this, most of them thought it was nonsense, but they did not refute it, and they were silent for a while. Li Zong thought for a while, and after a while, sighed: "Although Li Aiqing is young, his knowledge is far better than that of ordinary scholars. ”

The debate meeting ended in the afternoon, and everyone was talking about the madman's remarks in twos and threes, and it was not long before they all dispersed. In fact, there was a similar geocentric theory in the Song Dynasty, and this kind of doctrine did not affect the authority of the emperor, and it was not like what was written in the book at that time, thinking that the emperor was a star descending from earth, or that the true dragon was really the reincarnation of the dragon, a small number of village husbands and foolish women may believe these, but those who really have a little knowledge know that politics has nothing to do with what real dragon, so Li Xiang's theory will not threaten the imperial power, but everyone is somewhat skeptical, but they have not directly refuted it, thinking that since ancient times, I don't know how many theories there are to explain the composition of the universe, and these theories have their own theoretical basis, although your explanation has some truth, but it is far from being a theory.

Li Xiang faintly heard the word 'heresy,' and he didn't think about it, and secretly sighed to himself: If my theory is heresy, I'm afraid that in a few hundred years, everyone will become heresy.

Li Xiang and Lu Shiya also walked out with everyone, and just walked out, they saw a small eunuch shouting behind them: "Lord Li, please stay, the emperor wants you to speak in the back hall." ”

Li Xiangqi said: "Does my father-in-law know what the emperor told me?" But the little eunuch said, "The son will know when he goes." After speaking, he stood aside and waited for Li Xiang.

Lu Shiya said with a smile: "It must be Brother Li's amazing words today, and the emperor is going to summon you." ”

Because Li Zong only summoned Li Xiang alone, Lu Shiya took his leave and went back to the inn first, Li Xiang followed the little eunuch through the defense hall, to the back hall, and after the little eunuch reported, they walked into the hall together.

Li Xiang saw that Li Zong was sitting in the center, and there were two people sitting far away on the left and right, Li Xiang saw that it was Li Zhichang on the left, and a middle-aged man on the right, with a few strands of beard on his white face, and a slightly fat figure, who was one of the members of the debate conference just now, but he didn't seem to have spoken much just now.

Li Zong gave him a seat, Li Xiang sat down next to Li Zhichang, only to hear Li Zong smile and say: "Li Aiqing is very knowledgeable, and the theories he talks about are unfathomable, he is really young and promising." One of these two is Li Zhichang and Li Zhenren, and the other is Mr. Lin Mengxi, who is known as the widow of Huainan. (To be continued.) )